I am missing my sub folders in Outlook 2003 when using another employee's computer

Help. We have several employees who use a common pc in the reception area. When one employee signs on into her Outlook, she is missing some of her sub folders (personal not in the public folders). When she returns to her own pc, those folders are in her Outlook. This is a new issue, as she used the other pc about 3 months ago and all her Outlook folders were there. Does this sounds familiar to anyone? How can I remedy this problem for her? Many thanks.